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# `usePinchZoom`
React sensor hook that tracks the changes in pointer touch events and detects value of pinch difference and tell if user is zooming in or out.
## Usage
```jsx
import { usePinchZoom } from "react-use";
const Demo = () => {
const [scale, setState] = useState(1);
const scaleRef = useRef();
const { zoomingState, pinchState } = usePinchZoom(scaleRef);
useEffect(() => {
if (zoomingState === "ZOOM_IN") {
// perform zoom in scaling
setState(scale + 0.1)
} else if (zoomingState === "ZOOM_OUT") {
// perform zoom out in scaling
setState(scale - 0.1)
}
}, [zoomingState]);
return (
<div ref={scaleRef}>
<img
src="https://www.olympus-imaging.co.in/content/000107506.jpg"
style={{
zoom: scale,
}}
/>
</div>
);
};
```
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